I installed a Takagi Jr. propane tankless back when oil shot up to over $4/gallon here in the northeast. Paid ~$400 for it on ebay. It’s been trouble free - going on about 8 years.
Family is 4. It has 3 temp settings. I keep it on the lowest one. Full hot on the shower is hot enough for me in dead of winter (wife would like hotter). 2 showers running at the same time would be too much for the Jr. model. Been filling 100 lb propane tanks at the local hay & feed store myself. (propane companies are way too expensive). $65 per tank for the last 4 years. A 100lb tank (23.6 gal) lasts me ~ 9 weeks in summer, ~7 weeks in winter.
That’s a better price than most... and people like it. Thanks for sharing.
http://www.amazon.com/Takagi-T-KJr2-IN-LP-Indoor-Tankless-Propane/dp/B0057X28EG